Filler properties in paints and varnishes and effects in the system/formula:
- loose structure, small particle size
→ easy and rapid incorporation, excellent dispersion properties (especially puriss), very low sedimentation, no hard sediment, good rheological properties, matting effect, very fast drying, good intercoat adhesion, water vapor permeability, good pigment dispersion, good edge covering, easy and rapid sanding, excellent stone-chipping resistance, good mechanical properties, good corrosion protection
- non-ground filler, low grit content
→ low abrasivity
- mineralogical composition (hardness)
→ scratch resistance, abrasion resistance
- very low electrical conductivity (< 100 µS), no butter effect
→ no disturbing salts/electrolytes, good stability in water-based systems, good pigment paste stability and good bath stability in electrophoretic applications, good corrosion protection
- chemically inert
→ weather and chemical resistance, expecially against acids
- refraction index similar to binder
→ good transparency in clear coatings
- surface treatment possible
→ good interaction with the polymer matrix, rheology control
- high purity
→ also suitable for food contact incl. drinking water as per BfR and FDA regulation